> Polish allies did nothing until France was invaded.
On the contrary [0] - "Germany had started low-intensity undeclared war on Czechoslovakia on 17 September 1938. In reaction, the United Kingdom and France on 20 September formally asked Czechoslovakia to cede its territory to Germany, which was followed by Polish territorial demands brought on 21 September and Hungarian on 22 September."
On the contrary [0] - "Germany had started low-intensity undeclared war on Czechoslovakia on 17 September 1938. In reaction, the United Kingdom and France on 20 September formally asked Czechoslovakia to cede its territory to Germany, which was followed by Polish territorial demands brought on 21 September and Hungarian on 22 September."
[0] https://en.wikipedia.org/wiki/Munich_Agreement